Jamaican distance runner Kemoy Campbell has been taken to hospital after collapsing during the men's 3,000m at the Millrose Games in New York.
Campbell, 28, was acting as a pace-setter when he collapsed and fell into the infield after the second turn just beyond the 1,000m mark.
He was given medical attention by the side of the track and then carried out of the stadium on a stretcher.
The athlete is in a stable condition in hospital, according to reports.
However, organisers have yet to provide official information on his condition.
The Jamaica Gleaner, quoting the athlete's agent Ray Flynn, said Campbell had to be revived by defibrillator before being taken to an intensive care unit.
"We were all shocked to see what happened, but thank God, he is doing better. He has his girlfriend and his brother beside him," Flynn told the newspaper.